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On average, a car has an engine the size of a suitcase that weighs about 140 kilograms. A jet engine weighs several tons, and several people can fit inside it. But the most powerful engine ever built is the size of your fist and weighs no more than a can of soup. It’s the human heart… How does it work? The heart is basically a large muscle that is constantly working. It beats 100,000 times a day, almost 40 million times a year, and more than 2 billion times in a lifetime. With each beat, about 1/3 cup of blood moves through the heart. That’s 7,500 liters a day. Any other machine would break under such a heavy load. But not the amazing human heart! #brightside Subscribe to Bright Side / @brightside Music by Epidemic Sound https://www.epidemicsound.com/ Stock materials (photos, footage, etc.): https://www.depositphotos.com https://www.shutterstock.com https://www.eastnews.ru